Respuesta :

alexasalnicov

Step-by-step explanation:

for b) on top you prove it by multiplying the reciprocal of the fraction which is 4/9÷6/5 then using GCF you reduce it so that it's 4/3÷2/5 and then multiply to get 8/15

#1

[tex]\\ \sf\longmapsto \dfrac{4}{9}\div \dfrac{5}{6}[/tex]

[tex]\\ \sf\longmapsto \dfrac{4}{9}\times \dfrac{6}{5}[/tex]

  • Cancel 6 and 9

[tex]\\ \sf\longmapsto \dfrac{8}{15}[/tex]

  • Verified✓

#2

[tex]\\ \sf\longmapsto \dfrac{13.8\times 6.5}{7+\sqrt{2}}[/tex]

[tex]\\ \sf\longmapsto \dfrac{89.7}{7+1.4}[/tex]

[tex]\\ \sf\longmapsto \dfrac{89.7}{8.4}[/tex]

[tex]\\ \sf\longmapsto 10.678[/tex]

[tex]\\ \sf\longmapsto 10.68[/tex]

[tex]\\ \sf\longmapsto 10.7[/tex]

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